Capital gains tax calculator

Stay compliant with the taxman, even if your broker leaves you hanging.

Belgium's capital gains tax is coming. This tool analyses your transactions and calculates your tax liability, so you know exactly what to declare.

1. Which investment platform do you use?

ℹ️ If you're a Curvo member, we handle your capital gains tax calculation and send you the results automatically.

2. Import your transactions

Help us make the tool smarter by uploading your transaction history from your broker account. Most brokers let you export your transactions as a CSV file. For the best results, upload your complete transaction history from when you first opened your account.

Your file will be kept securely and encrypted, and it will never leave our server. In return, you'll get the most accurate estimate of your capital gains tax when the tool launches.

3. Your email

We're still building the tool, and we can't wait to share it with you. We'll launch in January 2026, right when the new capital gains tax comes into effect.